**Exhibit 21**

 

**The Titan Corporationand its subsidiariesas of March 8, 2004**

 
|   | **Name** |                                                          | **Subsidiary of:** |                  | **Domicile** |                |
|--------|----------|---------------------------------------------------------------|--------------------|-----------------------|--------------|---------------------|
| 1      |     | Advent Systems, Inc.                                          |               | The Titan Corporation |         | California          |   |
| 2      |     | Canco, LLC                                                    |               | Cayenta, Inc.         |         | Delaware            |   |
| 3      |     | Cayenta Canada Corp.                                          |               | Canco LLC             |         | Canada              |   |
| 4      |     | Cayenta eUtility Solutions – eMunicipal Solutions,  Inc. |               | Cayenta Canada Corp.  |         | Nevada              |   |
| 5      |     | Cayenta Operating LLC                                         |               | Cayenta, Inc.         |         | Delaware            |   |
| 6      |     | Cayenta, Inc.                                                 |               | The Titan Corporation |         | Delaware            |   |
| 7      |     | Datacentric Communications Corporation                        |               | The Titan Corporation |         | Delaware            |   |
| 8      |     | Datron Transworld Communications International  Ltd.          |               | The Titan Corporation |         | U.S. Virgin Islands |   |
| 9      |     | Datron World Communications, Inc.                             |               | The Titan Corporation |         | California          |   |
| 10     |     | Horizons Technology International, Ltd.                       |               | The Titan Corporation |         | Barbados            |   |
| 11     |     | International Systems LLC                                     |               | The Titan Corporation |         | California          |   |
| 12     |     | LinCom Wireless, Inc.                                         |               | LinCom Corporation    |         | Delaware            |   |
| 13     |     | Procom Services, Inc.                                         |               | The Titan Corporation |         | California          |   |
| 14     |     | Titan Africa, Inc.                                            |               | Titan Wireless, Inc.  |         | Delaware            |   |
| 15     |     | Titan Deutschland GmbH                                        |               | The Titan Corporation |         | Germany             |   |
| 16     |     | Titan Facilities, Inc.                                        |               | The Titan Corporation |         | Virginia            |   |
| 17     |     | Titan Italia Srl                                              |               | The Titan Corporation |         | Italy               |   |
| 18     |     | Titan Scan Technologies Corporation                           |               | The Titan Corporation |         | Delaware            |   |
| 19     |     | Titan Systems Solutions UK Ltd.                               |               | The Titan Corporation |         | United Kingdom      |   |
| 20     |     | Titan Wireless Afripa Holding, Inc.                           |               | Titan Wireless, Inc.  |         | Delaware            |   |
| 21     |     | Titan Wireless, Inc.                                          |               | The Titan Corporation |         | Delaware            |   |

 

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